What happens during the Snaplex Upgrade
When the Snaplex is upgraded: a) JCCs will go through a rolling restart. As one JCC is being restarted, the others will continue processing the pipelines on the older version. The next JCCs will wait for max 15 minutes (configurable value at the snaplex level) for the running pipelines to finish, before they get restarted. b) FeedMasters (FM) will go through a rolling restart. One FM will be up and running as the other goes into restart mode. The running FM will queue up the messages in the inbound queue up to 10GB size. When FMs restart they will persist the messages from the queue to the disk. These will be retrieved back into the queue from disk. Once JCCs are up, FM starts sending the messages from the queue to be processed.Tip: Recovering Deleted Pipelines from Execution History in Dashboard
From @cstewart in the thread https://community.snaplogic.com/t/pipeline-versioning/2445: If a pipeline has been deleted or changed, but there was an execution, when you click on the pipeline name in Dashboard (the Dashboard will show executions up to 60 days) then when you see the pipeline in Designer, it shows the pipeline which was actually executed, as it doesn’t exist any more, you can’t edit it, or save it. However you can export it! Once exported, you can import it back in. This gives you an extra 30 days after the pipeline is purged from the recycle bin.
